LTC1629I

更新时间： 2024-10-31 22:57:35

品牌	Logo	应用领域
凌特 - Linear		稳压器开关
页数	文件大小	规格书
28页	332K
描述
PolyPhase, High Efficiency, Synchronous Step-Down Switching Regulators

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LTC1629I 数据手册

LTC1629/LTC1629-PG

PolyPhase, High Efficiency,

Synchronous Step-Down Switching Regulators

DESCRIPTIO

FEATURES

The LTC^®1629/LTC1629-PG are multiple phase, dual,

synchronous step-down current mode switching regula-

torcontrollersthatdriveN-channelexternalpowerMOSFET

stages in a phase-lockable fixed frequency architecture.

The PolyPhase^TMcontroller drives its two output stages

out of phase at frequencies up to 300kHz to minimize the

RMS ripple currents in both input and output capacitors.

The output clock signal allows expansion for up to 12

evenly phased controllers for systems requiring 15A to

200A of output current. The multiple phase technique

effectively multiplies the fundamental frequency by the

number of channels used, improving transient response

while operating each channel at an optimum frequency for

efficiency. Thermal design is also simplified.

■

Dual Controller Operates from One to Twelve Phases

Reduces Required Input Capacitance and Power

Supply Induced Noise

■

Current Mode Control Ensures Current Sharing

Phase-Lockable Fixed Frequency: 150kHz to 300kHz

1.8MHz Effective Switching Frequency

True Remote Sensing Differential Amplifier

OPTI-LOOP^TMCompensation Reduces C_OUT

1% Output Voltage Accuracy

Power Good Output Voltage Monitor (LTC1629-PG)

Wide V_INRange: 4V to 36V Operation

Very Low Dropout Operation: 99% Duty Cycle

Adjustable Soft-Start Current Ramping

Internal Current Foldback Plus Shutdown Timer

Overvoltage Soft-Latch Eliminates Nuisance Trips

Micropower Shutdown

An internal differential amplifier provides true remote

sensing of the regulated supply’s positive and negative

output terminals as required for high current applications.

Available in 28-Lead SSOP Package

A RUN/SS pin provides both soft-start and optional timed,

short-circuit shutdown. Current foldback limits MOSFET

dissipation during short-circuit conditions when the

overcurrent latchoff is disabled. OPTI-LOOP compensa-

tion allows the transient response to be optimized over a

wide range of output capacitance and ESR values. The

LTC1629-PG includes a power good output pin that re-

places the AMPMD control pin of the LTC1629.

APPLICATIO S

■

Desktop Computers

■

Internet Servers

■

Large Memory Arrays

■

DC Power Distribution Systems

, LTC and LT are registered trademarks of Linear Technology Corporation.

OPTI-LOOP and PolyPhase are trademarks of Linear Technology Corporation.

TYPICAL APPLICATIO

10Ω

5V TO 28V

10µF ×4

35V

0.1µF

LTC1629-PG

TG1

CERAMIC

0.003Ω

BOOST1

SW1

0.47µF

0.1µF

1µH

×2

RUN/SS

PGOOD

BG1

PGND

1000pF

SENSE1

–

SENSE1

3.3k

TG2

BOOST2

SW2

0.003Ω

SGND

OUT

0.47µF

1.6V/40A

16k

×2

1µH

BG2

DIFFOUT

EAIN

–

INTV

10µF

OUT

SENSE2

16k

1000µF ×2

–

: T510E108K004AS

L1, L2: CEPH149-IROMC

M1, M3: IRF7811

M2, M4: IRF7809

OUT

1629 TA01

D1, D2: UP5840

Figure 1. High Current Dual Phase Step-Down Converter

12 3 4 5 6 7...28

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与LTC1629I相关器件

型号	品牌	获取价格	描述	数据表
LTC1629IG	Linear	获取价格	PolyPhase, High Efficiency, Synchronous Step-Down Switching Regulators
LTC1629IG#TR	Linear	获取价格	LTC1629 - PolyPhase, High Efficiency, Synchronous Step-Down Switching Regulator; Package:
LTC1629IG#TRPBF	Linear	获取价格	LTC1629 - PolyPhase, High Efficiency, Synchronous Step-Down Switching Regulator; Package:
LTC1629IG-PG	Linear	获取价格	PolyPhase, High Efficiency, Synchronous Step-Down Switching Regulators
LTC1629IG-PG#PBF	Linear	获取价格	LTC1629 - PolyPhase, High Efficiency, Synchronous Step-Down Switching Regulator; Package:
LTC1629IG-PG#TR	Linear	获取价格	LTC1629 - PolyPhase, High Efficiency, Synchronous Step-Down Switching Regulator; Package:
LTC1629IG-PG#TRPBF	Linear	获取价格	LTC1629 - PolyPhase, High Efficiency, Synchronous Step-Down Switching Regulator; Package:
LTC1629I-PG	Linear	获取价格	PolyPhase, High Efficiency, Synchronous Step-Down Switching Regulators
LTC1629-PG	Linear	获取价格	PolyPhase, High Efficiency, Synchronous Step-Down Switching Regulators
LTC1629-PG_15	Linear	获取价格	PolyPhase, High Efficiency, Synchronous Step-Down Switching Regulators

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